Electronic component new business visa for Germany

Win Source is an online Electronic Components Business in China from years it is running successfully. This was the first and the only cross-border platform concentrating on selling Hot-Sale products and (EOL-End of life). Win Source has also branches in Hong Kong, Singapore, Philippine etc for embedded ICs, semiconductors, passives, discrete, Connectors, interconnects electro-mechanical parts etc. Now Win Source wants to shift its business in other countries and get more clients and profit.

So I have made a connection with a German citizen and starting a new company but I do not know the visa process. Could someone inform me about it? What is immigration? How it works? I have also seen blue card please tell me what is this? Is it also necessary for me or not? anything else that will help me in the my travelling from China to Germany.